Source check: 2026-10-04. Shared WPI courses are linked only where the standardized exam and class match are confirmed. Local grades may not equal WPI class numbers. Your authority's current documents control.
Exam route under review
Program authority: Maryland Board of Waterworks and Waste Systems Operators, Maryland Department of the Environment (MDE)
Local levels: Class G - No chemical treatment; Class 1 - Disinfection; Class 2 - Chemical Treatment; Class 3 - Simple Iron Removal; Class 4 - Complete Treatment; Class 5 - Site Specific. The exam application specifies Water 5 options RO, DE, Arsenic, or GWUDI.
Official sources establish Maryland's process-specific classes and ABC involvement, but not the current standardized versus customized product for every class. Supplementary MCET guidance describes ABC assembling exams to Board prescriptions, indicating customized rather than standardized exams; its administrator designation and current class-by-class scope were not verified. Maryland Classes 1–4 must not be equated with WPI standardized Classes I–IV.
No state-matched course is linked for this stream yet.
Table 3 lists water-treatment classes 1, 2, 3, 4, 5 and G; .10B says examinations are based on need-to-know criteria for each specific classification determined by the Board.
Water Treatment Plant Operator (T): 1 2 3 4 5 G; 'For Water 5, write RO, DE, Arsenic, or GWUDI.'
Computer-based examinations are described as available for all categories through a project coordinated with ABC. This establishes ABC involvement, not standardized-exam adoption.
Exam route under review
Program authority: Maryland Board of Waterworks and Waste Systems Operators, Maryland Department of the Environment (MDE)
Local levels: Class 1 - Lagoons; Class 2 - Physical/Biological; Class 3 - Package Activated Sludge Plants; Class 4 - Trickling Filters/Rotating Biological Contactors (RBC); Class 5 - Activated Sludge; Class 6 - Site Specific; Class S - Solids Handling; Class A - Advanced Wastewater Treatment. MDE additionally publishes a Wastewater 5A certification exam study guide; 5A is not a separate class in the opened regulatory table.
Wastewater evidence was checked separately. Official classification and 5A outline sources do not identify the current exam product or provider by class. Supplementary MCET guidance describes Board-prescribed ABC exams, including site-specific Class 6, but its current scope and designated-administrator status were not verified. Class A is used with other classes; S is required only where works are limited to solids handling. No standardized WPI class mapping is established.
No state-matched course is linked for this stream yet.
Table 2 lists wastewater classes 1–6, S and A; its notes state S applies to works limited to solids handling and A is used in conjunction with other classes.
The official guide supplies a 5A outline covering secondary treatment, solids handling, tertiary treatment, nitrogen removal, phosphorus removal, laboratory interpretation and math; it says technical categories were established by the exam provider without naming the product.
The Board establishes examination standards and issues certificates; its Wastewater Treatment 5A Study Guide announcement is dated March 20, 2025.
Exam route under review
Program authority: Maryland Board of Waterworks and Waste Systems Operators, Maryland Department of the Environment (MDE)
Local levels: One class: Water Distribution (WD in COMAR; D in Board/application terminology). The examination application labels it Water Distribution Systems Operator (D), class 1.
A single local distribution classification is established independently of treatment. No authoritative current standardized WPI scope or correspondence to WPI Class I was verified. Supplementary MCET guidance describes a Maryland-specific Water Distribution exam prescription assembled by ABC, but is not confirmed designated-administrator evidence. COMAR does not classify distribution separately when operated and supervised by certified water-treatment personnel.
No state-matched course is linked for this stream yet.
.03E: 'Water distribution systems are classified as one class, Water Distribution (WD)'; separate classification is unnecessary under certified water-treatment plant personnel. Table 7 labels the operator class D.
Category/class choices include 'Water Distribution Systems Operator (D) 1'. This local label does not establish WPI Class I equivalence.
Exam route under review
Program authority: Maryland Board of Waterworks and Waste Systems Operators, Maryland Department of the Environment (MDE)
Local levels: Class 1 - Wastewater collection systems with gravity flow; Class 2 - Wastewater collection systems with gravity and pumped or vacuum flow. The opened exam application offers only Wastewater Collection System Operator (C), class 2.
Two certification classifications are verified, but a separate Class 1 exam was not established. Supplementary MCET guidance provides a Class 2 prescription and describes ABC assembly to Board instructions; official current standardized/customized product confirmation was not found. Neither local class has a verified WPI standardized-class correspondence. Collection is not separately classified when operated and supervised by certified wastewater-treatment personnel.
No state-matched course is linked for this stream yet.
.03C defines Class 1 gravity flow and Class 2 gravity with pumped or vacuum flow; it exempts separate classification under certified wastewater-treatment personnel. Table 6 identifies both operator classifications.
The examination choices show 'Wastewater Collection System Operator (C) 2', not a Class 1 examination.
Dedicated prep is not available or being sold yet.